Pneumatic blast device.



PATENTED SEPT. 5, 1905.

G. G. NIGHTINGALE. PNEUMATIC BLAST DEVICE.

APPLICATION FILED JAN. 28. 1905.

UNITED STA'FES PA' IJENT OFFICE.

GEORGE G. NIGHTINGALE, OF NEW YORK, N. Y., ASSIGNOR TO LEO ROSENGARTEN, OF NEWV YORK, N. Y.

PNEUMATIC BLAST DEVICE.

Specification of Letters Patent.

Patented Sept. 5, 1905.

To (all III/1,0771, it may concern.-

be it known that I, Gnoeen Ur. NIGHTIN- came, a citizen of the United States, residing in the borough of Manhattan, county and State of New York, have invented certain new and useful Improvements in Pneumatic Blast Devices, of which the following is a specification.

My present invention relates to pneumatic blast devices, and more particularly to that class of pneumatic blast devices which are adapted for use for mechanical painting; but while my device is especially adapted for mechanical painting the same may be used for sand-blasting in working glass and other delicate work, if desired.

The object of my invention is to provide a pneumatic blast device which is capable of much finer adjustment than has heretofore been attained, so that the blast may be directed in a greater variety of directions without inconvenient movement of the body or stooping of the operator of the device. Heretofore devices of this character have been unsatisfactory by reason of the fact that it has been impossible through use of such devices to direct the blast into small crevices and corners without necessitating the bending of the body of the operator to inconvenient and tiring positions. \Vith a device constructed in accord with my present invention if the operator desires to direct the blast to a small crevice or corner either above or below him he may do so through a simple adjustment of the nozzle of the device without changing the position of his body.

Further objects of my invention are to provide many improved details of structure hereinafter shown and described, and shown in the accompanying drawings, in which like reference characters refer to like parts, and in which Figure 1 is a side elevation of a pneumatic blast device constructed in accord with my invention. Fig. 2 is an enlarged detail view of the nozzle forming a part of my apparatus. Fig. 3 is a transverse section through the head of the nozzle. Fig. 4. is a face view of the head of the nozzle. Fig. 5 isaside elevation of one of the nozzle-valve-operating levers, showing also a portion of one of the nozzle-pipes. Fig. 6 is a detail view illustrating the method of attachment of the nozzle to the supply-tank connections. Fig. 7 is a detail perspective view of the nozzle head and shank.

My improved device being especially adapted for mechanical painting, I will refer to the same hereinafter as a painting apparatus and describe the use of the apparatus as such.

Referring now in detail to the drawings, 1 represents a tank which is supplied with paint through an opening closed by plug 2, in which ping 2 is seated a compressed-air-supply pipe 3.

1 is a compressed-air pipe leading from the tank 1 to the nozzle of my apparatus hereinafter described.

5 is a paint-supply pipe leading from the lower side of the tank 1 to the nozzle of my apparatus hereinafter described, the mouth or inlet of the pipe 5 being covered by a screen 6 to disintegrate and prevent congealed particles of paint from passing into the pipe 5 and obstructing the same.

7 is a valve controlling pipe 3. 8 is a valve controlling pipe 4. 9 is a yalve controlling pipe 5, all of which valves may be located at any suitable position in their respective pipes, but are shown located adjacent the tank 1.

10 is a plug closing an opening provided in the lower end of the tank 1 for cleaning purposes, said opening being conveniently located opposite the screen 6.

Attached to the forward ends of the pipes a 5 through means of bayonet-joints 12 13 on the pipes 4 5, respectively, is a nozzle comprising a pair of parallel pipes 1a 15, hinged together at their inner ends by a hinge 16, encircling each of said pipes 14 15, and upon which hinge 16 said pipes 14 are capable of limited movement. Pipes 1a 15 are controlled by valves 1? 18, respectively, valve 17 in the pipe 14: being disposed at a right angle to the valve 18 in the pipe 15. Valve 17 is operated by a lever 19, fulcrumed to a bracket 20 on the pipe 14 and connected to valve 17 by a link 21 and a valve-arm 22. Lever 19 is held normallyin position to close valve 17 by means of a spring 23, coiled about the fulcrum pin seated in the bracket 20. Valve 18 is operated by a lever 24., fulcrumed on a bracket 25 and connected to valve 18 through means of a link 26 and an operatingarm 27. Lever 24 is held normally in position to close valve 18 through means of spring 28, coiled about the fulcrum pin on the bracket 25. Levers 19 and 21 operate in planes at right angles to each other. Valves 1? .18 and levers 19 2 1 are located in their respective pipes in suitable positions to allow the hand of the operator to assume a natura position in operating the same.

29 is an adjustable stop comprising ascrewthreaded stop-pin having a thumb-wheel 30 thereon and screw-threaded in a swivel 31, so that the stop 29 may be thrown out of the path of engagement of the lever 19. Stop 29 is provided for the purpose of regulating the thrust of the lever 19, which purpose 'is accomplished through adjustment of the stop 29 by rotation of the thumb-wheel 30 and then swinging the stop 29 on its swivel 31 into the plane of reciprocation of the lever 19. Stop 29 is shown in operative position in Fig. 5. Lever 24 is also provided with an adjustable stop 29, mounted in a swivel 31 and having a thumb-whee130. (See dotted lines, Fig. 2.) At their outer ends pipes 14 15 are provided with crooks 32 33, respectively, having convex beveled edges 34 35, respectively, which engage the concave beveled edges 36 at each end, Fig. 3, of a union 37 provided with a central spraying partition or wall 38, having concave surfaces directed toward a central outlet 39. In order to draw the pipes 14 15 toward each other a suflicient extent to support and hold the mixing-chamber 37 therebetween, a right and left threaded hand-screw is provided, which is screw threaded into sockets 41 on the pipes 14 15. Outlet 39 in the union 37 has screw-threaded thereto a clamping block or plate 42, having wedgeshaped perforations 43 therein adapted to receive the wedge-shaped shank 44 of the nozzle-head 45, having an elongated mouth 46. Nozzle-head 45 is connected to the shank 44 through arotary pi pe-joint 47, which is screwthreaded on shank 44.

The operation of my device is as follows: Paint being supplied to the tank 1 and valves 7, 8, and 9 being operated, compressed air will passthrough pipe 3 into the upper end of the tank 1, forcing paint out past the screen 6 into pipe 5. Compressed air will flow from the top of tank 1 into pipe 4, so that pipes 4 and 5 will be supplied, respectively, with compressed air and paint. The valves 17 18 are normally closed. The operator grasping pipes 14 and 15 presses his thumb upon the lever 24 and with one or all of his remaining fingers upon lever 19. Compressed air and liquid paint are thereby permitted to flow into the union 37 so long as pressure is maintained on the levers 19 and 24. Paint and air passing into the union 37 strike the partition 38, creating a spray which mixes completely as it passes through the shank 44 and out of the nozzle-head 45. Nozzle-head 45 may be rotated on shank 44 in order to adjust the plane of the stream of paint-vapor. If it is desired to direct the stream of paint-vapor either up or down, wheel 40 may be operated slightly, loosening the grip of pipes 14 15 on the union 37, permitting a rotary adjustment by hand of the union 37 or pipes 14 15. The wedgeshaped perforation 43 permits of the ready insertion or removal of the shank 44 from the clamping-block 42 for any desired purpose.

If it is desired to limit the supply of compressed air or paint in the pipes 14 15 when extremely-fine work is being done with the apparatus, the stops 29 are swung into position on'either or both of said pipes 14 15, as desired, so that at each pressure of the levers 19 or 24 only so much compressed air or liquid paint, such as the case may be, or only so much of both, will be admitted into the union 37.

I do not wish to be limited to the exact details of structure herein shown and described, since the same may be varied without depart ing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a pneumatic blast apparatus comprising a pair of supply-pipes, a union rotatably mounted thereon, valves in said supply-pipes and spring-controlled levers controlling said valves.

2. In a pneumatic blast apparatus comprising a union, a nozzle-head mounted on said union, supply-pipes connected to said mixingchamber, rotatable valves in said pipes,springpressed levers and suitable link connection between said ievers and said Valves.

3. In a pneumatic blast device comprising a pair of supply-pipes, a union rotatably mounted on said pipes, a nozzle-head and a rotary pipe connection between said nozzle-head and union.

4. In a pneumatic blast device the combination with a pair of pipes, of a union rotatably mounted on said pipes and having a spraying wall or partition therein, a nozzle-head and a rotary pipe connection between said nozzlehead and said union at a point in said union opposite said spraying wall or partition.

5. In a pneumatic blast device comprising a pair of parallel pipes crooked at their forward ends to form bearings, a union rotatably seated in said bearings, a nozzle-head mounted on said union and aright and left threaded handwheel seated in said pipes to increase or decrease friction between said union and said bearings.

6. In a pneumatic blast device comprising a pair of supply-pipes, a union connecting said pipes, a nozzle-head mounted on said union, valves in said pipes, operating-levers connected to said valves, and adjustable stops for limiting the extent of movement of said levers.

- 7. In a pneumatic blast device comprising a pair of pipes, a union connecting said pipes, a nozzle-head mounted on said union, valves in said pipes, operating-levers connected to said valves and swivelly-mounted adjustable stops for limiting the extent of movement of said levers.

8. In a pneumatic blast device comprising a pair of supply-pipes, a union connecting said pipes, a nozzle-head mounted on said union, valves in said pipes, operating-levers connected to said valves, swivel-posts mounted on said pipes, stop-pins for limiting the movement of said levers screw-threaded in said swivelposts and thumb-Wheels for operating said stop-pins.

9. In a pneumatic apparatus, the combination with a pair of supply-pipes, of a pair of parallel pipes hinged to each other, bayonetjoints between said parallel pipes and said supply-pipes, a union connecting said paral lel pipes and a nozzle-head mounted on said mixing-chamber.

10. In a pneumatic blast apparatus the combination with a pair of supply-pipes, a union rotatably mounted on said supply-pipes, a clamping-block screw-threaded to said union and having a Wedge-shaped perforation therein, a wedge-shaped nozzle-head shank seated in said perforation and a nozzle-head having a suitable rotary pipe connection with said shank.

11. In a pneumatic blast apparatus comprising a pair of supply-pipes, a union provided with a directing-wall dividing said union into two compartments, a nozzle-head mounted on said union, valves on said supply-pipes and spring-controlled levers for operating said valves.

12. In a pneumatic blast device comprising a pair of supply-pipes, a union provided with a directing-wall having concave surfaces and dividing said union into two compartments, a nozzle-head mounted on said union, valves in said pipes, operating-levers connected to said valves and adjustable stops for limiting the extent of the movement of said levers.

13. A pneumatic blast apparatus, comprising a pair of pipes, a union rotatabl mounted between and connecting said pipes with'a suitable outlet, a nozzle-head mounted on said union and forming said outlet, and means for increasing or decreasing the distance between said pipes to increase or decrease the friction between said pipes and said union to permit of a rotatable adjustment of said union.

14E. Ina pneumatic blast apparatus, the combination with a pair of supply-pipes, a pair of parallel pipes hinged to each other, suitable joints between said parallel pipes and said supply-pipes, a union rotatably mounted between said pipes, and means for holding said pipes against or permitting relative movement to hold said union against or permit a rotation of said union.

GEORGE (1}. N 1G HTINGALE.

\Vitnesses:

\VM. P. HAMMOND, HARRY E. lixmu'r. 

